221366032 has 10 divisors (see below), whose sum is σ = 428896718. Its totient is φ = 110683008.

The previous prime is 221366023. The next prime is 221366039. The reversal of 221366032 is 230663122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 172029456 + 49336576 = 13116^2 + 7024^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221365988 and 221366006.

It is not an unprimeable number, because it can be changed into a prime (221366039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6917673 + ... + 6917704.

Almost surely, 2^221366032 is an apocalyptic number.

It is an amenable number.

221366032 is a deficient number, since it is larger than the sum of its proper divisors (207530686).

221366032 is a wasteful number, since it uses less digits than its factorization.

221366032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13835385 (or 13835379 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 221366032 is about 14878.3746424131. The cubic root of 221366032 is about 604.9279626452.

The spelling of 221366032 in words is "two hundred twenty-one million, three hundred sixty-six thousand, thirty-two".